# Something Weird: HDMI cannot write frames continuously

**URL:** https://discuss.pynq.io/t/something-weird-hdmi-cannot-write-frames-continuously/1042
**Category:** Support
**Created:** [March 19, 2020, 1:07am UTC](https://discuss.pynq.io/t/something-weird-hdmi-cannot-write-frames-continuously/1042 "2020-03-19T01:07:40Z")
**Posts on this page:** 1
**Showing post:** 11

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### Author: ![neocsc](https://avatars.discourse-cdn.com/v4/letter/n/898d66/32.png) [@neocsc](https://discuss.pynq.io/u/neocsc)
#### Post date: [March 26, 2020, 1:25pm UTC](https://discuss.pynq.io/t/something-weird-hdmi-cannot-write-frames-continuously/1042/11 "2020-03-26T13:25:38Z")

</div>

Hi @cathalmccabe, I am trying to rebuild the video overlay as follows:

1.HDMI project demo ([https://reference.digilentinc.com/learn/programmable-logic/tutorials/zybo-z7-hdmi-demo/start](https://reference.digilentinc.com/learn/programmable-logic/tutorials/zybo-z7-hdmi-demo/start)) works in standalone mode.  
2. I export hwf and bit and when I load the overlay this is the output of

**from pynq import Overlay**

**from pynq.lib.video import**

**base = Overlay(“/home/xilinx/pynq/overlays/video/video.bit”)**  
**base?**

Type: Overlay  
String form: \<pynq.overlay.Overlay object at 0xb3ab60b0\>  
File: /usr/local/lib/python3.6/dist-packages/pynq/overlay.py  
Docstring:  
Default documentation for overlay /home/xilinx/pynq/overlays/video2/video.bit. The following  
attributes are available on this overlay:

## IP Blocks

video/hdmi\_in/axi\_gpio\_video : pynq.lib.axigpio.AxiGPIO  
video/axi\_vdma\_0 : pynq.lib.video.dma.AxiVDMA  
video/hdmi\_in/v\_tc\_in : pynq.overlay.DefaultIP  
video/hdmi\_out/v\_tc\_out : pynq.overlay.DefaultIP  
video/hdmi\_out/axi\_dynclk\_0 : pynq.overlay.DefaultIP

## Hierarchies

video : pynq.overlay.DefaultHierarchy  
video/hdmi\_in : pynq.overlay.DefaultHierarchy  
video/hdmi\_out : pynq.overlay.DefaultHierarchy

## Interrupts

None

## GPIO Outputs

None

## Memories

processing\_system7\_0 : Memory

However, if I try to load the IP blocks, I have a problem as follows:  
**base.video.hdmi\_in.axi\_gpio\_video?**  
**Object `base.video.hdmi_in.axi_gpio_video` not found.**  
I can only load the axi\_dynclk.  
Could you please help? I don’t understand the issue.

I am enclosing a zip folder with the bitstream and hwh.

Thank you.  
[video.zip](https://discuss.pynq.io/uploads/short-url/d1yFuH5OytOuNoU822owQiiOTQx.zip) (437.8 KB)

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